Rakza Z has a slightly harder sponge, 51 degrees. What makes it heavier, cut to 157x150mm weighs 52g. According to what it's like to play with it, I'd say it's closer to ESN tensor rubbers than to Chinese sticky rubbers, but it's that stickiness that gives it extra spin, so it's actually a real hybrid rubber and, in my opinion, one of the best hybrid rubbers on the market. With counter topspin and flicks, it is not necessary to pay so much attention to the angle of the racket. I have noticed that if I misjudge the amount of opponent rotation, with the Rakza Z I can put the ball back on the table pretty easy. When I started playing with Rakza Z I noticed that I attack the opponents serve much more. Also, during the game I decide to counterspin more, because the rubber gives me more security, so I decide to attack more often. See my more detailed analysis in the video review below.